7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
6.4 Medium
AI Score
Confidence
Low
0.007 Low
EPSS
Percentile
80.0%
This host is missing a critical security update according to Microsoft
Bulletin MS11-013.
# Copyright (C) 2011 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.902288");
script_version("2022-05-25T07:40:23+0000");
script_tag(name:"last_modification", value:"2022-05-25 07:40:23 +0000 (Wed, 25 May 2022)");
script_tag(name:"creation_date", value:"2011-02-09 17:14:46 +0100 (Wed, 09 Feb 2011)");
script_cve_id("CVE-2011-0043", "CVE-2011-0091");
script_tag(name:"cvss_base", value:"7.2");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_name("Microsoft Kerberos Privilege Escalation Vulnerabilities (2496930)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2011 Greenbone Networks GmbH");
script_family("Windows : Microsoft Bulletins");
script_dependencies("secpod_reg_enum.nasl");
script_require_ports(139, 445);
script_mandatory_keys("SMB/registry_enumerated");
script_tag(name:"impact", value:"Successful exploitation could allow authenticated attackers to obtain a token
with elevated privileges on the affected system and allows a man-in-the-middle
attacker to force a downgrade in Kerberos communication between a client and
server.");
script_tag(name:"affected", value:"- Microsoft Windows 7 Service Pack 1 and prior
- Microsoft Windows XP Service Pack 3 and prior
- Microsoft Windows 2003 Service Pack 2 and prior");
script_tag(name:"insight", value:"The flaws are due to:
- An error in Kerberos implementation supporting weak hashing mechanisms
such as CRC32.
- An error in Kerberos that does not correctly enforce stronger default
encryption standards.");
script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");
script_tag(name:"summary", value:"This host is missing a critical security update according to Microsoft
Bulletin MS11-013.");
script_tag(name:"qod_type", value:"executable_version");
script_tag(name:"solution_type", value:"VendorFix");
script_xref(name:"URL", value:"http://support.microsoft.com/kb/2478971");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/46130");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/46140");
script_xref(name:"URL", value:"http://support.microsoft.com/kb/2478971");
script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2011/0326");
script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-013");
exit(0);
}
include("smb_nt.inc");
include("secpod_reg.inc");
include("version_func.inc");
include("secpod_smb_func.inc");
if(hotfix_check_sp(xp:4, win2003:3, win7:2) <= 0){
exit(0);
}
if((hotfix_missing(name:"2478971") == 0) || (hotfix_missing(name:"2425227") == 0)){
exit(0);
}
sysPath = smb_get_systemroot();
if(!sysPath){
exit(0);
}
sysVer = fetch_file_version(sysPath:sysPath, file_name:"system32\Kerberos.dll");
if(!sysVer){
exit(0);
}
if(hotfix_check_sp(xp:4) > 0)
{
SP = get_kb_item("SMB/WinXP/ServicePack");
if("Service Pack 3" >< SP)
{
if(version_is_less(version:sysVer, test_version:"5.1.2600.6059")){
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
exit(0);
}
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
else if(hotfix_check_sp(win2003:3) > 0)
{
SP = get_kb_item("SMB/Win2003/ServicePack");
if("Service Pack 2" >< SP)
{
if(version_is_less(version:sysVer, test_version:"5.2.3790.4806")){
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
exit(0);
}
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
else if(hotfix_check_sp(win7:2) > 0)
{
if(version_is_less(version:sysVer, test_version:"6.1.7600.16722") ||
version_in_range(version:sysVer, test_version:"6.1.7600.20000", test_version2:"6.1.7600.20860") ||
version_in_range(version:sysVer, test_version:"6.1.7601.10000", test_version2:"6.1.7601.17526") ||
version_in_range(version:sysVer, test_version:"6.1.7601.20000", test_version2:"6.1.7601.21623")) {
security_message( port: 0, data: "The target host was found to be vulnerable" );
}
}